A duo wont kill you with sentries because of the move speed from your stealth unless you get caught out of position in a very bad way. Dust maybe. A good trilane would much like they would vs any hero really. If their carry tries to harass you as was suggested, he's in for a rude awakening because not only will you outdamge him thanks to the orb attack, but you also wont draw creep aggro by orb attacking while he will taking more damage than you + creep damage. If the support is there to harass with the carry, then hes not pulling, and their carry is not farming as he should, so you will gain more experience and win the lane.That's why every support should get sentries and convince their carry to harass you out of a lane ASAP. Void's problem is that he needs 2+ items to be effective - damage + bkb, or some kind of setup for his ulti and one of the popular picks - Naga, absolutely destroys him. I haven't seen 1 position LD in ages, mostly because building Heaven's Halberd is a pretty good idea and if you get caught with your bear on low hp, good teams will kill the bear then you for extra money. If you want to carry, stick to AM, the only other picks that seem to work in every situation is Weaver, Alchemist and Naix.
Again this all depends on which supports, which carries, etc...
Ps sutekh, I see your drow game and I raise you a clinkz vs mirana qop game:http://dotabuff.com/matches/305928463